When a volcano expert becomes convinced that a cataclysmic natural disaster is about to unfold, a volcanologist Professor John Shepherd and his graduate students believes that recent unexplainable volcanic activity as all of the volcanoes in the world are going … Xander Berkeley, Amy Jo Johnson, Reiko Aylesworth, David O'Donnell, George R. Sheffey, Michael Durrell, Vlado Mihailov Added on Amazon Prime 2022-06-08.